What is a single-pass restore, and what is it designed to accomplish?
Traditional backup would require multiple passes and lots of time to restore the data -- one pass for the last full-volume backup, one pass for each incremental backup since then and another pass for each individual mailbox.
Single-pass restore means one pass for the complete email application including the mailboxes. One-pass restore generally means that applications that previously required multiple restores of different backup datasets now require only a single restore. Single-pass restore greatly simplifies and speeds up restores.
This was first published in January 2014